Our riding gang was made up of 5 DR's. One of which started easily - the rest were a bear.
No matter what the starting procedure - no matter how skilled the operator in four stroke starting procedures - a couple wouldn't start when cold unless we bumped 'em down a hill or towed them.
Yes, the valves were correctly adjusted, the carbs were perfectly jetted, everything was done right (I work at Powroll, if we can't figure it out, I don't know who can!).
The regular four stroke starting procedure will help - so will infinite patience and a titanium right leg.
We used to camp on top of a hill - now everyone in the group has gone to the DRZ - with e-start, of course!